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我試圖創建一條提示,提示用戶命名他們已導入到音樂表顯示應用的歌曲。訪問alertController中聲明的變量
我創建了一個功能,這個命名過程:
- (NSString *)nameImportedSong {
NSString *songName;
UIAlertController * alertController = [UIAlertController alertControllerWithTitle: @"New Song"
message: @"Choose a song name"
preferredStyle:UIAlertControllerStyleAlert];
[alertController addTextFieldWithConfigurationHandler:^(UITextField *textField) {
textField.placeholder = @"song name";
textField.textColor = [UIColor blueColor];
textField.clearButtonMode = UITextFieldViewModeWhileEditing;
textField.borderStyle = UITextBorderStyleRoundedRect;
}];
[alertController addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
NSArray * textfields = alertController.textFields;
UITextField * namefield = textfields[0];
NSString *chosenSongName = [NSString stringWithFormat:@"%@", namefield.text];
}]];
songName = ; // <-------------how do I assign chosenSongName to songName?
[self presentViewController:alertController animated:YES completion:nil];
return songName;
}
我如何分配chosenSongName從警報到我SONGNAME變量,警報之外?
完美的作品。謝謝。 – Lorraine